sushy 1.9.0 release

meta:version: 1.9.0
meta:diff-start: -
meta:series: train
meta:release-type: release
meta:pypi: no
meta:first: yes
meta:release:Author: Tony Breeds <tony@bakeyournoodle.com>
meta:release:Commit: Tony Breeds <tony@bakeyournoodle.com>
meta:release:Change-Id: Ie06772b7594f1bc8c27d4350efb98ce146c1b296
meta:release:Code-Review+1: Julia Kreger <juliaashleykreger@gmail.com>
meta:release:Code-Review+1: Dmitry Tantsur <dtantsur@protonmail.com>
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Workflow+1: Sean McGinnis <sean.mcginnis@gmail.com>